Core Web Vitals Checker - Test your sites in one click - Calibre
How can this tool help me?We built Core Web Vitals Checker so you can see how people experience your website without setting up complex dashboards or processes. Core Web Vitals Checker reports four site speed metrics based on real Google Chrome browsing data. Each metric focuses on a different aspect of user experience, such as loading, interactivity and visual stability, so you know where to focu
Small Bundles, Fast Pages: What To Do With Too Much JavaScript - Calibre
Small Bundles, Fast Pages: What To Do With Too Much JavaScript Minimising the amount of JavaScript in your pages is an essential step to ensure a speedy user experience. This post will explain why bundle size matters and recommend tools and processes you can follow to monitor, visualise, and most importantly, shrink your JS bundles. How does bundle size affect performance? Large amounts of JavaScr
How Google Pagespeed Works: Improve Your Score - Calibre
Ben Schwarz July 2, 2019 (Updated: November 11, 2020) It’s no secret that speed has become a crucial factor in increasing revenue and lowering abandonment rates. Now that Google uses Core Web Vitals as a ranking factor, many organisations have become laser-focused on performance. In this article, we uncover how PageSpeed calculates it’s critical speed score. Over the last couple of years, Google h
Profiling React component performance with Chrome devtools - Calibre
Ben Schwarz November 28, 2017 (Updated: October 27, 2020) React was one of the first major front-end frameworks to not only name, but tout its rendering performance. React’s virtual dom is famous for efficiently rendering components—but what happens when those components suddenly don’t feel fast anymore? Where do you look? How do you fix it? In this walk-through, we’ll show how to find and fix slo
The Critical Request: How to Prioritise Requests to Improve Speed - Calibre
The Critical Request: How to Prioritise Requests to Improve Speed Serving a website seems pretty straightforward: send down some HTML, the browser figures out what resources to load next. Then, we wait patiently for the page to be ready. Little did you know, a lot is going on under the hood. Have you ever wondered how the browser figures out which assets should be requested and in what order? Toda
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Calibre: Monitor Core Web Vitals and Page Speed with Synthetic and Real-User Data
